N-substituted-1-(arylsulfinyl and arylsulfonyl)methanesulfonamides

ABSTRACT

IN WHICH R independently is hydrogen (i.e., no substitution on the phenyl ring), lower alkyl, lower alkoxy, halo or trifluoromethyl; x is 1 to 2; n is 1 to 3, and R1 and R2 independently are hydrogen, lower alkyl or phenyl and together with the nitrogen atom form a heterocycle which may contain an oxygen atom as a hetero atom. The compounds are prepared by reacting the corresponding N-substituted-1(arylthio)methanesulfonamide with small, incremental amounts up to substantially equimolar of 30% hydrogen peroxide in glacial acetic acid at 65*-70*C., to obtain the sulfinyl compound, or substantially two equimolar proportions of 30% hydrogen peroxide in glacial acetic acid at reflux temperature to obtain the sulfonyl compound, and recovering the corresponding sulfinyl or sulfonyl product. The compounds are useful as intermediates for making the dihalomethane analogs, the latter being useful as antimicrobials. The compounds of the formula

[ Jan. 21, 1975 N-SU BSTlTUTED-l-( ARYLSULFINYL AND ARYLSULFONYL)METHANESULFONA- MIDES [75] Inventors: Christian T. Goralski; Thomas C.

Klingler, both of Midland, Mich.

[73] Assignee: The Dow Chemical Company,

Midland, Mich.

22 Filed: Mar. 5, 1973 21 Appl. No.2 337,866

[52] U.S. CI ..260/247.l R, 260/293.73,

260/556 AR, 424/248, 424/267, 424/32] [51 Int. Cl....C07d 87/46, C07d 29/34, C07c 143/78 [58] Field of Search..... 260/2471, 556 AR, 326.82,

[56] References Cited UNITED STATES PATENTS 3,412,149 11/1968 SChlOf et al 260/556 A 3,641,033 2/1912 Levine 260/294.8 r

OTHER PU BLICATIONS Morrison et al., Organic Chemistry, (1970), pp. 756-7.

Primary Examiner-Lorraine A. Weinberger Assistant ExaminerMichael Shippen Attorney, Agent, or Firm-Theodore Post; C. Kenneth Bjork [57] ABSTRACT The compounds of the formula fig 1 SO CH SO N in which R independently is hydrogen (i.e., no substitution on the phenyl ring), lower alkyl, lower alkoxy, halo or trifluoromethyl; x is l to 2; n is l to 3, and R and R independently are hydrogen, lower alkyl or phenyl and together with the nitrogen atom form a heterocycle which may contain an oxygen atom as a hetero atom. The compounds are prepared by reacting the corresponding N-substituted-l-(arylthio)methanesulfonamide with small, incremental amounts up to substantially equimolar of 30% hydrogen peroxide in glacial acetic acid at 65-70C., to obtain the sulfinyl compound, or substantially two equimolar proportions of 30% hydrogen peroxide in glacial acetic acid at reflux temperature to obtain the sulfonyl compound, and recovering the corresponding suliinyl or sulfonyl product. The compounds are useful as intermediates for making the dihalomethanc analogs. the

latter being useful as antimicrobials.

13 Claims, N0 Drawings N-SUBSTITUTED-l-(ARYLSULFINYL AND ARYLSULFONYL )METIIANESULFONAMIDES SUMMARY OF THE INVENTION This invention concerns l-(arylsulfinyl and arylsulfonyl)methanesulfonamides corresponding to the formula wherein R independently represents hydrogen (i.e., no

substitution on the phenyl ring), lower alkyl, lower alkoxy, halo or trifluoromethyl; x represents an integer from 1 to 2; n represents an integer from 1 to 3; and R, and R independently represent hydrogen, lower alkyl or phenyl and together with the nitrogen atom form a heterocycle which may contain an oxygen atom as hetero atom. In the specification and claims, lower alkyl and lower alkoxy represent, respectively, a l to 4 carbon atom straight or branched chain alkyl group, such as, for example, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, secondary butyl or tertiary butyl, or the corresponding all-roxy groups; and halo represemts fluoro, chloro or bromo.

The compounds wherein x represents 1 are prepared by adding small, incremental amounts up to substantially equimolar of 30% aqueous hydrogen peroxide to a 1-(arylthio)methanesulfonamide in the presence of glacial acetic acid as the solvent medium at about 65 to about 70C. The l-(arylsulfinyl)methanesulfonamide product is recovered from the reaction medium by allowing the acetic acid solution to cool to room temperature and allowing the product to crystallize out, or by pouring the latter onto ice and recrystallizing the precipitated solid product from ethanol. The compounds wherein x is 2 are prepared by mixing a molar proportion of a l-(arylthio)methanesulfonamide with substantially 2 molar proportions of aqueous 30% hydrogen peroxide in the presence of glacial acetic acid as reaction medium at about to about C. then at reflux temperature to form the l-(arylsulfonyl)me- 45 DESCRIPTION OF SOME PREFERRED EMBODIMENTS The following examples describe representative preparations and the best mode contemplated by the inventors of carrying out the invention. Temperature is given in Centigrade degrees. The compounds are identified by elemental analysis and nuclear magnetic resonance spectra (nmr).

Example 1: N,N-Dimethyll phenylsulfonyl)methanesulfonamide To a solution of 10 g. (0.043 mole) of N,N-dimethyl- I-(phenylthio)methanesulfonamide in 43 ml. of glacial acetic acid is added 15 ml. of 30% aqueous hydrogen peroxide. The mixture is stirred for 16 hours at 27C. and then refluxed for one hour. The solution is poured onto ice and the precipitated solid recrystallized from ethanol to obtain 10.23 g. (90% yield) of fine white needles; mp. l02-l03C.

Anal. Calcd. for C H NO S C, 41.05; H, 4.97; N,

5.32; S, 24.35. Found: C, 40.72; H, 5.14; N, 5.43; S, 2420.

Example 2: l-( 3 ,4-Dichlorophenyl )sulfinyl)methanesulfonamide To a solution of 0.50 g. (0.00l8 mol.) of l-((3,4- dichlorophenyl)thio)methanesulfonamidc in 25 ml. of glacial acetic acid is added 0.10 g. of 30% hydrogen peroxide, and the reaction mixture is heated at to C. The progress of the reaction is followed by the nuclear magnetic resonance spectroscopy, and over a period of 7 hours an additional 0.37 g. of 30% hydrogen peroxide is added in small incremental amounts. After the 7 hour reaction period, the acetic acid solution is allowed to cool, and the title compound separates as fluffy, white crystals. The crystals are filtered, washed with ether, and dried to give 0.37 g. of 1-((3,4- dichlorophenyl)sulfinyl)methanesulfonamide, m.p. 205207C.

Anal. Calcd. for C I-l Cl NO S C, 29.17; H, 2.45;

Cl, 24.61; N, 4.86; S, 22.26. Found: C, 28.90; H, 2.52; Cl, 24.66; N, 4.96; S, 22.46.

Example 3:

Pursuant to procedures of Examples 1 and 2, the following l (arylsulfinyland arylsulfonyl)methanesulfonamides are prepared.

TABLE I l-(ARYLSULFINYL AND ARYLSULFONYLMETHANESULFONAMDES 1 s on so N/ km 0" 2 2 \R2 n Analyses Calculated Found R i NR R M "c c H N S C a N s (a) 4-cu 2 Nag 179-181 38.54 4.45 5.62 25.72 38.19 4.38 5.55

(b) 4-cH 1 NR2 215-217 41.18 4.75 6.00 27.49 41.30 4.77 6.01 27.70

(c) l-Br 2 NR2 162-165 (d) 3,4-Cl2 2 NHQ 179-181 27.64 2.32 4.60 21.08 27.71 2.33 4.49 21.31

(e) 2,4,5-c1 2 N'HQ 218-220 24.83 1.78 4.13 18.94 25.00 1.93 4.20 19.50

TABLE I (Con't.)

Analyses Calculated Found R x NR1R2 Mp, "c c a N s c a N s (h) l-Cl 2 128-130 38.88 u.15 1.12 18.87 .19 1.12 1.23

1 11 0119 2 NC) 133-1315 53. 5 7.01 3.89 17.8u 53.61 6.90 1.03 17.73

(R) a 2 NH@ 151-153 50.1 1 1.21 1.50 20.60 50.01 1.15 1.

Crude sample which was not analyzed. Chlorine analysis, Calculated for C7H7Cl2NOl S2: Cl, 23.

Found: C1, 23.10.

Chlorine analysis, Calculated for C11H1l1ClNO5S2:

The compounds of this invention are useful as intermediates for the preparation of the corresponding dihalomethane analogs,

@so -cy so nn n wherein Y is chlorine or bromine and R, R R x and n have the meaning previously given. Thus, 1,1- dibromo-N,N-dimethyl-l phenylsulfonyl )methanesulfonamide is prepared from the compound of Example 1 by mixing the latter with aqueous sodium hypobromite in excess with stirring, filtering off the l,ldibromo product and recrystallizing the latter from ethanol. Similarly, 1,1-dibromol (pbromophenyl)sulfonyl)methanesulfonamide is prepared from the compound of Example 3(0) by reacting the latter with aqueous sodium hypobromite in excess and recrystallizing the resulting precipitate from a mixture of chloroform, methanol and hexane.

l,l-Dibromo-N,N-dimethyl-1-(phenylsulfinyl)methanesulfonamide is prepared by treatment of N,N- dimethyl-l-(phenylsulfinyl)methanesulfonamide with aqueous sodium hypobromite.

The dihalomethane analogs so prepared are useful as antimicrobials for the control of bacteria, fungi and yeasts such as S. aureus, C. albicans, E. coli, P. aeruginosa, S. typhosa, M. phlei, T. mentagrophytes, B. subtilis, C. pelliculosa, A. aerogenes, P. pullilans, A. terreus and R. nigricans. This is not to suggest that such dihalo analogs are equally effective against the same organisms or at the same concentrations.

What is claimed is:

l. A compound represented by the formula Chlorine analysis, Calculated for C7H6Cl3NOLtS2:

10. 8. Found 10.25

wherein R independently represents hydrogen, lower alkyl, lower alkoxy, halo or trifluoromethyl; x represents an integer from 1 to 2; n represents an integer from 1 to 3 and R, and R independently represent hydrogen or lower alkyl and together with the nitrogen atom form a heterocycle of the group of morpholine and piperidine.

2. The compound of claim 1 in which is N,N- dimethyl-l phenylsulfonyl )methanesulfonamide.

3. The compound of claim 1 which is l-((4- methylphenyl)sulfonyl)methanesulfonamide.

4. The compound of claim 1 which is l-((4- bromophenyl)sulfonyl)methanesulfonamide.

5. The compound of claim 1 which is 1-((3,4- dichlorophenyl)sulfonyl)methanesulfonamide.

6. The compound of claim 1 which is 1-((2,4,5- trichlorophenyl)sulfonyl)methanesulfonamide.

7. The compound of claim 1 which is l-((pmethoxyphenyl)sulfonyl)-N,N-dimethylmethanesulfonamide. I

8. The compound of claim 1 which is 4- (((phenylsulfonyl)methyl)sulfonyl)morpholine.

9. The compound of claim 1 which is 4-((((4- chlorophenyl)sulfonyl)methyl)sulfonyl)morpholine.

10. The compound of claim 1 which is 1-((((4-tbutylphenyl)sulfonyl)methyl)sulfonyl)piperidine.

11. The compound of claim 1 which is 4-phenyl-l- (((phenylsulfonyl)methyl)sulfonyl)piperidine.

12. The compound of claim 1 which is 1-((4- methylphenyl)sulfinyl)methanesulfonamide.

13. The compound of claim 1 which is l-((3,4-

dichlorophenyl)sulfinyl )methanesulfonamide. 

2. The compound of claim 1 in which is N,N-dimethyl-1-(phenylsulfonyl)methanesulfonamide.
 3. The compound of claim 1 which is 1-((4-methylphenyl)sulfonyl)methanesulfonamide.
 4. The compound of claim 1 which is 1-((4-bromophenyl)sulfonyl)methanesulfonamide.
 5. The compound of claim 1 which is 1-((3,4-dichlorophenyl)sulfonyl)methanesulfonamide.
 6. The compound of claim 1 which is 1-((2,4,5-trichlorophenyl)sulfonyl)methanesulfonamide.
 7. The compound of claim 1 which is 1-((p-methoxyphenyl)sulfonyl)-N,N-dimethylmethanesulfonamide.
 8. The compound of claim 1 which is 4-(((phenylsulfonyl)methyl)sulfonyl)morpholine.
 9. The compound of claim 1 which is 4-((((4-chlorophenyl)sulfonyl)methyl)sulfonyl)morpholine.
 10. The compound of claim 1 which is 1-((((4-t-butylphenyl)sulfonyl)methyl)sulfonyl)piperidine.
 11. The compound of claim 1 which is 4-phenyl-1-(((phenylsulfonyl)methyl)sulfonyl)piperidine.
 12. The compound of claim 1 which is 1-((4-methylphenyl)sulfinyl)methanesulfonamide.
 13. The compound of claim 1 which is 1-((3,4-dichlorophenyl)sulfinyl)methanesulfonamide. 